diff --git a/composer.json b/composer.json
index 28927a6..0b2374e 100644
--- a/composer.json
+++ b/composer.json
@@ -31,7 +31,7 @@
     "phpstan/extension-installer": "^1.1",
     "phpstan/phpstan": "^0.12",
     "phpstan/phpstan-phpunit": "^0.12",
-    "phpunit/phpunit": "^9.5.8",
+    "phpunit/phpunit": "^9.5.9",
     "slam/phpstan-laminas-framework": "^0.12",
     "squizlabs/php_codesniffer": "^3.6"
   },